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Liquid crystal tunable wave filter and configuration method thereof

A technology for tuning filters and filters, applied in static indicators and other directions, can solve problems such as affecting the field of view and reducing transmittance, and achieve the effects of no mechanical rotation, high pass rate, and narrow half width.

Inactive Publication Date: 2010-08-11
SHENZHEN KINGWAY OPTOELECTRONICS
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

To solve this problem, more stages are required for the Leo configuration or split element configuration, and more birefringent elements for the Salk configuration, which in turn cause a decrease in transmission and affect the field of view

Method used

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  • Liquid crystal tunable wave filter and configuration method thereof
  • Liquid crystal tunable wave filter and configuration method thereof
  • Liquid crystal tunable wave filter and configuration method thereof

Examples

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Embodiment Construction

[0044] The configuration method of the present invention can produce many different specific configuration structures, and the present invention will be described in detail below in conjunction with examples.

[0045] Corresponding to a four-stage cascaded Leo configuration in the prior art (see figure 1 ), the configuration method of the present invention can produce several new specific configuration structures, and we only enumerate three kinds of specific configuration structures here (referring to Figure 9 , Figure 10 ,and Figure 11 ). Figure 9 The configuration shown is a combination of the first two consecutive Leo cascades and the last two consecutive Leo cascades, using four birefringent optical elements in each combination. Figure 10 and Figure 11 The configuration shown is the combination of three consecutive Leo cascades, and seven birefringent optical elements are used in the combination. The difference is that the positions of the three consecutive casc...

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Abstract

The invention discloses a liquid crystal tunable wave filter and a configuration method thereof. The wave filter comprises a plurality of stages of cascaded Leo configuration wave filter units, and each Leo configuration wave filter unit consists of polarizing sheets of both sides and birefraction optical elements in the middle, wherein parts of or all of the Leo configuration wave filter units are merged through two continuous cascades or three continuous cascades for forming a merged unit, the merging mode is an overlapped type or fan type merging mode, and the birefraction optical elements are liquid crystal tunable wave plates or fixed wave plates or the combination of the liquid crystal tunable wave plates and the fixed wave plates. The liquid crystal tunable wave filter of the invention has the advantages of high passing rate, narrow full width at half maximum, high shielding rate, adjustable light spectrum range, high stability, no need of mechanical rotation, real-time controllability and the like, and can be widely applied to various fields such as imaging, biology, medicine, materials, optics, photonics, astronomy and the like.

Description

technical field [0001] The invention relates to a tunable filter, in particular to a liquid crystal tunable filter and a configuration method thereof. Background technique [0002] There are mainly the following types of wavelength tunable filters: tunable filters based on mode coupling, tunable filters based on semiconductor laser structure, fiber Bragg gratings (FBGs), etc. [0003] Tunable filters based on mode coupling are based on various mode couplings such as acousto-optic, electro-optic or magneto-optic effects. The incident light is first processed by a single mode, such as the transverse electric (TE) mode, which is converted into another mode, such as the transverse magnetic (TM) mode, by periodic perturbation. Acoustic, electric or magnetic fields can be used to generate periodic perturbations depending on correlation effects, under which only light waves within a very narrow wavelength range satisfying the mode coupling conditions can pass through, resulting in...

Claims

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Application Information

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IPC IPC(8): G02F1/133
Inventor 唐守平
Owner SHENZHEN KINGWAY OPTOELECTRONICS
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